/**
 * 处理富文本里的图片宽度自适应
 * 1.去掉img标签里的style、width、height属性
 * 2.修改所有style里的width属性为max-width:100%
 * 3.img标签添加style属性：max-width:100%;height:auto
 * @param html
 * @return string
 */
function formatRichText(html: string) {
    // 去掉img标签里的style、width、height属性
    let newContent = html.replace(/<img[^>]*>/gi, (match, capture) => {
        match = match.replace(/style="[^"]+"/gi, '').replace(/style='[^']+'/gi, '')
        match = match.replace(/width="[^"]+"/gi, '').replace(/width='[^']+'/gi, '')
        match = match.replace(/height="[^"]+"/gi, '').replace(/height='[^']+'/gi, '')
        return match
    })
    // 修改所有style里的width属性为max-width:100%
    newContent = newContent.replace(/style="[^"]+"/gi, (match, capture) => {
        match = match.replace(/width:[^;]+;/gi, 'max-width:100%;').replace(/width:[^;]+;/gi, 'max-width:100%;')
        return match
    })

    // img标签添加style属性：max-width:100%;height:auto
    newContent = newContent.replace(/style=""/gi, '')
    newContent = newContent.replace(/\<img/gi, '<img style="max-width:100%;height:auto;display:block;margin:0px 0;"')
    newContent = newContent.replace(/\<li/gi, '<li style="list-style: none; padding: 0; margin: 0"')
    newContent = newContent.replace(/\<ul/gi, '<ul style="padding: 0; margin: 0"')
    return newContent
}

export default formatRichText
